What this controller is
The Fuji Electric PXF5APE2-MVMA1 is a self-tuning 1/8 DIN (48 x 96mm) compact temperature and process controller with a 50ms sampling speed. It's a current-production part, so this is what you'd specify into a new BOM line or order as a direct replacement for an existing PXF5 installation.
What the key specs mean for panel fit
The 1/8 DIN form factor (48 x 96mm) is the standard panel cutout for a single-loop controller — it slides into the same hole as any other 1/8 DIN unit, so swapping an older controller or specifying this into a new panel doesn't require re-punching the panel. Self-tuning means the auto-tune routine runs at startup to set PID gains; it's not adaptive tuning that continuously adjusts during the process.